KTH ROYAL INSTITUTE Dual-fuel combustion for the ... KTH ROYAL INSTITUTE OF TECHNOLOGY Dual-fuel combustion

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  • KTH ROYAL INSTITUTE

    OF TECHNOLOGY

    Dual-fuel combustion for the

    introduction of renewable alcohol

    fuels in heavy-duty diesel engines

    Nicola Giramondi

    Prof. Anders Christiansen Erlandsson (KTH)

    Dr. Anders Westlund (Scania), Prof. Mihai Mihaescu (KTH)

  • • Title: Dual-fuel combustion for the introduction of renewable alcohol fuels in heavy-duty diesel engines

    • Timeline: August 2016 – Fall 2020

    • Research Program: Fordonsstrategisk Forskning och Innovation (FFI)

    • Project partners:

    2017-10-10KTH – ICE DIVISION NICOLA GIRAMONDI 2

    Project overview

  • • Project motivation

    • Research questions

    • Research methodology

    • Project status and plan

    2017-10-10KTH – ICE DIVISION NICOLA GIRAMONDI 3

    Summary

  • 2017-10-10 4

    Diesel pilot-ignited

    alcohol direct injection

    in heavy-duty engines

    Project motivation

    KTH – ICE DIVISION NICOLA GIRAMONDI

  • 2017-10-10 5

    Motivation

    KTH – ICE DIVISION NICOLA GIRAMONDI

    Alcohol-Diesel Direct Injection

    Controllability (Injection strategy)

    ↑ Indicated efficiency

    Diffusion combustion (At high loads)

    ↓ Cycle-to-cycle variations

    Oxygen content ↓ UHC, soot

    ↑ Heat of vaporization (↓ In-cylinder peak

    temperature) ↓ NOx

    References: Boretti (2012); Haraldson (2014); Gao et al. (2013); Sarjovaara, Alantie and Larmi (2013); Zheng, Li and Han (2015).

  • Dual-fuel engine for marine applications

    6

    Wärtsilä methanol-diesel concept Mixing-controlled combustion

    Reference: Haraldson, 2014

    KTH – ICE DIVISION NICOLA GIRAMONDI 2017-10-10

  • 2017-10-10 7

    Injection system geometry and

    injection strategy

    Research questions

    KTH – ICE DIVISION NICOLA GIRAMONDI

  • 2017-10-10 8

    Dual-fuel injection system prototype

    KTH – ICE DIVISION NICOLA GIRAMONDI

    Design of the dual-fuel injection system

  • Influence of the geometrical

    parameters of the injection system on:

    Ignition timing,

    combustion phasing Heat release rate

    Ignition and combustion characteristics

    Degree of premixing

    Alcohol-diesel spray-spray interaction

    Liquid penetration

    Local equivalence ratio

    Temperature field

    2017-10-10 9

    Injection system geometry

    KTH – ICE DIVISION NICOLA GIRAMONDI

     With different injection strategies…

  • 2017-10-10 10

    Injection strategy

    KTH – ICE DIVISION NICOLA GIRAMONDI

     At low and high loads

     With respect to a pure diesel baseline

    Influence of the injection strategy:

    Ignition timing,

    combustion phasing Heat release rate

    Performance Indicated efficiency

    Emissions UHC, CO, NOx, soot

    Combustion variability COV of IMEP, misfire

  • 2017-10-10 11

    Coupling CFD simulation and

    single-cylinder engine testing

    Research methodology

    KTH – ICE DIVISION NICOLA GIRAMONDI

  • 2017-10-10 12

    Tools and methods

    KTH – ICE DIVISION NICOLA GIRAMONDI

    Combustion simulation

    • CFD method development + Injection system pre-design • Sweeping: Nozzle geometry and injection strategy

    • Targeting: Ignition and combustion characteristics

    Metal engine testing

    • Prototype testing • Sweeping: Nozzle geometry and injection strategy

    • Targeting: Emissions, performance and combustion variability

    Combustion simulation

    • CFD method validation

    Optical engine testing

    • Combustion optical diagnostics • Targeting: Ignition characteristics + Spray-spray interaction

  • 2017-10-10 13

    Project status and plan

    KTH – ICE DIVISION NICOLA GIRAMONDI

  • 2017-10-10 14KTH – ICE DIVISION NICOLA GIRAMONDI

    Project status and plan

    • Research questions

    • Injection system design

    • Preliminary CFD simulation campaign

    • Combustion simulation method

    • MATLAB post-processing tools

    Accomplishments

    • Experimental system set-up

    • CFD method refinement

    • CFD simulation campaign

    On-going work

    • Publication of CFD results

    • Experimental campaign

    • Publication of experimental results

    • CFD method validation

    Near-future work

  • 2017-10-10 15

    Thanks for your attention!

    KTH – ICE DIVISION NICOLA GIRAMONDI

  • 2017-10-10 16

    References

    KTH – ICE DIVISION NICOLA GIRAMONDI

    Boretti, A. (2012) ‘Advantages of converting Diesel engines to run as dual fuel

    ethanol-Diesel’, Applied Thermal Engineering. Elsevier Ltd, 47, pp. 1–9. doi:

    10.1016/j.applthermaleng.2012.04.037.

    Haraldson, L. (2014) ‘IEA BIOENERGY AND AMF WORKSHOP – HEAVY DUTY

    ENGINES [PowerPoint Slides]’ Available from http://www.ieabioenergy.com/wp-

    content/uploads/2014/05/P10-Heavy-duty-engines-Haraldson.pdf

    Gao, T. Y. et al. (2012) ‘An Enabling Study of Low Temperature Combustion with

    Ethanol in a Diesel Engine’, Proceedings of the Asme Internal Combustion Engine

    Division Fall Technical Conference - 2012, 135(December), pp. 217–226. doi:

    10.1115/1.4024027.

    Sarjovaara, T., Alantie, J. and Larmi, M. (2013) ‘Ethanol dual-fuel combustion concept

    on heavy duty engine’, Energy. Elsevier Ltd, 63(x), pp. 76–85. doi:

    10.1016/j.energy.2013.10.053.

    Zheng, M., Li, T. and Han, X. (2015) ‘Direct injection of neat n-butanol for enabling

    clean low temperature combustion in a modern diesel engine’, Fuel. Elsevier Ltd,

    142, pp. 28–37. doi: 10.1016/j.fuel.2014.10.075.